Gas-controlling device for linotype-machines



C. SYLVESTHE.

GAS CONTROLLING DEVICE FOR LINOTYPE MACHINES. APPlicATloN FILED APR. 16,|918.

1,396,705. Patented Novfs, 1921.

C. SYLVESTRE.

GAS CONTROLLING DEVICE FOR LINOTYPE MACHINES. APPLICATION FILED APR. 16.H218.

1,396,705. y PatentedNov. 8,1921.

2 SHEETS-SHEU 2.

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UNITED STATES PATENT N OFFICE.

(LAS-CON'IIIELOLLING-v DEVICE FOR IINOTYPE-MACI-IINES.

Specification of Letters Patent.

Patented-Nov. 8,1921.

Application filed Apre 1e, 191s. serial No. 228,985.

(GRANTED 'UNDER THE PROVISIONS `OIF THE ACT 0F MARCH 3, 1921, 41 lSTAT.L., 1313.)

y which the following is the specification.

The invention relates to improvements in gas controlling devices forlinotype machines and theprineipal object of the invention is to providean appliance which will automatically control the supply of gas fed tothe pot gas burner and the mouth burner and dependent on the temperaturein the pot and in the mouth piece of the linotype machine. l y

A further object of the invention is to construct an appliance with` theabove object in a simple,` durable and inexpensive manner and such thatit can be readily applied to a machine.

A further object is to construct the appli.-

ance so that it can be regulated to be particularly :sensitive to slighttemperature changes. i i 1 With the above general and other objects inView, which will become more apparent as the description proceeds, theinvention consists essentially in the arrangment and construction ofparts hereinafter more particularly described and later pointed out inthe appended claims, reference being had to the accompanying drawings inwhich Figure 1`represen`ts an end View oi the device as applied on thepot and mouth piece of a linotype machine.

Fig. 2 represents an enlarged detailed side view or' the device asremoved from `the machine and withthe connecting pipes detached.

Fig. 3 represents an inverted plan View ot the device as it appears inFig. 2. Fig. 4 represents a longitudinal vertical sectional `viewthrough the device.

Fig. 5 represents as face View .of the central valve member. i

Fig. 6- represents a longitudinal sectional View through the centralandthrough one of the end members of the valve, the section beine' taken inthe plane denoted by the line X Fig. 5.

Fig. 7 represents a longitudinal sectional view through the centralvalve member, the

generated' by a section being taken in the plane denoted by the line Z-ZFig. 5.

Fig. 8 represents a vertical sectional view through the centralvalvemember, the section being taken in the plane denoted by the lineY-Y Fig. 6.

In the drawings like characters of reference indicate correspondingparts in the several figures.

l1 represents the pot of an ordinary linotype machine in which the metalis melted prior to being expelled through the customary mouth piece 2associatedr with the pot. The metal of slugs placed inthe pot are meltedby the heat generated by the pot gas burner 3 and the metal expelledthrough the mouth piece is further heated by the heat gas burner 4termed the pot mouth burner.

The gas to these burners is supplied by the gas pipes 5 and 6.' Withinthe pot a mercury thermometer 7 is placed, this `being connected to amercury pipe 8 and a second mercury thermometer 9 is inserted in themouth piece and is connected to a mercury pipe 10. i

The above parts are all of ordinary construction and are found on themajority ot existing linotype machines. Accordingly l have notconsidered it necessary to further enlarge on the details of such partsas for a` complete understanding of my invention,

which relates to the controlling' ot the gas` fed to the two burners anddependent upon temperature,` it is only necessary to control thegas fedin the pipes 5 and 6 directly in accordance with the temperatures in theCrucible and mouth piece and as indicate!)L by columns of mercury in thepipes 8 and '1.0.

The appliance which Iprovide is actually an automatic valve connectedwith the gas pipes and mercury pipesand with a gas feed pipe andarranged in such a manner that the pressures of the mercury in the pipes8 and l() operate directly to shut oil or admit of the feed of gas fromthe main feed pipe to the pipes 5 and 6, the amount of gas admitted tothese pipes being directly in proportion tov the pressure of the mercuryin the pipes 8 and l() respectively.

. The valve indicated generally by the reference numeral 11 is nowdescribed in detail.

It comprises threeimain body parts,` a central member 12 and two similar(right and left) end members 13 and 14, the end members being securelyfastened to the central member by means of pairs of side bolts 15 and 16provided.

The central member is bored centrally and longitudinally to provide aninlet duct 17 passing from face t0 face of the central member andconnected by means of a radiating duct 18 with the main gas feed pipe19. rIhe opposing faces of the central member are machined to providevalve chambers 20 and 21 and valve seats 22 and 23 at the ends of theduct 17. y

24 and 25 are gas outlet passages positioned at diametrically oppositesides of the central member 12, one communicating with the chamber 20outside the valve seat 22 and the other with the chamber 21 outside thevalve seat 23. 'j The outer end of the passage 24 communicates directlywith the gas pipe 6 leading to the pot mouth burner while the outer endof the passage 25 connects direetly with the pipe 5 leading directly tothe pot gas burner. j

26 and 27 are disk valves adapted to seat on the valve seats and to theinner face of which I secure, as by soldering, coiled springs 28 and 29,the springs having their inner ends seated cna cross web 30 positionedin the duet 17 at the juncture of said duct with the duct 18. j

At this point Iwish it to be understood that this cross web must notobstruct the free passage of gas from the duct 17 to that 18.

The springs 28 and 29 not only support the valves but they hold themnormally un seated as shown in Figs. 4 and 6.

The end members of the valve are identical in construction so I haveonly considered it necessary to describe one of them.

Each end member is formed with two eX- tensions 31 and 32 positioned atright angles one to the other and each bored to provide two intersectingpassages 33 and 34. The outer end of the passage 34 is interiorly screwthreaded to receive an adjusting screw 35 while the inner end of thepassage opens to a chamber 36 formed in the face of the end member andseparated from the adjoining chamber in the central member by adiaphragm 37 which is jammed between the end member and thecentral'member when the same are fastened together by the bolts 15` and16.

It will be here noticed that the passage 33 is formed by boringcompletely through the end member and then closing the upper end of thepassage by a screw plug 38. The plug allows of filling with mercury fromtime to time as occasion may require.

At this point I wish it to be distinctly understood that there are twodiaphragms, one dividing each of the internal chambers provided betweenthe central member and the end members.

The valves 26 and 27 herein before disclosed are held by the springsnormally against the inner face of the diaphragms. The diaphragms arepreferably made from a material such as leather which is flexible andwill allow of bulging under pressure.

The open end of the passage 33 in the member 13 is connected directlywith the mercury pipe 10 while the open end of the passage 33 of themember 14 is directly connected with the mercury pipe 8.

The above completes the description of the parts but in order that theoperation of the device may be better understood I will now describe themanner in which it is used, assuming that under normal set conditionsthe temperatures developed in the crucible and in the mouth piece aresuch that the diaphragms take the positions as shown, being held inthese positions by the pressure of the mercury on one side actingagainst the pressure of the spring on the other. Obviously the mercurycolumns maintained in the pipes 8 and 10 and in the passages and 34 andcavities 3G exert an inward pressure on the outer faces of thediaphragms which is counter-acted by the spring pressure exerted againstthe inner faces of the diaphragms through the disks.

Upon the temperatures rising in the crucible or in the mouth piece orboth the mercury rising in the pipes will increase the pressure againstone or other of the diaphragms or both, as the case may be, which actionwill cause the diaphragms to bulge toward the disks and in so doing theywill cause the disks to close in against the action of the springs andtoward the valve seats and thereby reduce the feed of the gas in passingfrom the duet 17 to the outlet ports 24 and 25. This reduction of thegas fed will result directly in a decrease of the heat applied to thecrucible and to the mouth piece so that upon an increase in temperatureabove normal in either the crucible or mouth piece there is a reductionin the amount of gas fed to these members.

Conversely it will be obvious if Such a condition arises that areduction in the temperature in either the crucible or mouth piece willgive an increased feed of gas, for heating purposes, to either thecrucible or the mouth piece.

From the above it will be apparent that this appliance controlsindependently both the crucible and the mouth piece as the diaphragmsoperate independently one of the other and directly as the result of thepressure of the mercury in the pipes leading to such parts.

If at any time it is desired to make the appliance more or lesssensitive this can be done by screwing in or out the adjusting screws35`which action will vary the space containing the mercury columns andwill consequently increase or decrease'the pressure of the mercury Aonthe diaphragm.

Normally these screws will be set to give what might be termed a fullgas feed at normal operating temperatures.

What I claim as my invention is l. In a type setting machine, thecombination with a metal pot, the mouth piece thereof, the gas pipeleading to the pot and the mouth piece and the mercury pipes associatedwith the potiand mouth piece and a gas supply pipe, of a gas controllingdevice inserted between the gas supply pipe and the gas and mercurypipes of the pot and mouth piece and provided with a pair of valves andinternally arranged such that the varying pressure of the mercury in thepot mercury pipe controls, through one valve, the feed of gas from thesupply pipe to the pot gas pipe and the varying pressure of the mercuryin the mouth piece mercury pipe controls through the other valve thefeed of gas from the supply pipe to the mouth gas pipe.

2. In a type setting machine, the combination with the metal pot, themouthpiece thereof, the gaspipes leading to the pot and the mouth pieceand the mercury pipes associated with the pot and mouth piece and a gassupply pipe, of a gas controlling device inserted between the gas supplypipe and the gas and mercury pipes of the pot and mouth piece andpresenting a gas inlet passage connected with the gas su ply pipe,separate interior chambers to which the gas inlet passage leads andhaving valve seats located at the entrances of the passage to thechambers, a diaphragm crossing each chamber and dividing each chamberinto two distinct inner and outer compartments, a normally open valveopposite the valve seat and to the inner side of the diaphragm, inletpassages connecting the outer compartments one with the mercury pipeofthe ot and the other with the mercury pipe o the mouth piece andpassages connecting the inner compartments one with the gas pipe of thepot and the other with the gas pipe of the mouth piece.

' 3. In a type setting machine, the combination with the metal pot, themouth piece thereof, the gas pipe leading to the potand the mouth pieceand the mercury pipes associated with the pot and mouth piece and a gassupply pipe, of a gas controlling device inserted between the gas supplypipe and the gas and mercury pipes of the pot and mouth pieceandpresenting a gas inlet passage connected with the gas supply pipe,separate interior chambers to which the gas inlet passage leads andhaving valve seats located at the entrances of the passage to thechambers, a flexible diaphragm crossing each chamber and dividing itinto two compartments, one `for gas and the other for mercury, adisplacer, a spring pressed valve opposing the valve seat in eachinstance and normally engaging the inner face of the dis placer, aconnection between one of the mercury compartments and the mercury pipeof the pot, a connection between the other of the mercury compartmentsand mercury pipe of the mouth piece` a connection between one of the gascompartments and the gas pipe of the pot and a` further connectionbetween the other of the gas compartments and the gas pipe of the mouthpiece. i 1 i 4. A gas controlling device for type setting machinescomprising a valve casing presenting two inner valve chambers, flexiblediaphragms crossing the chambers and dividing them each into twodistinct inner and outer compartments, a gas supply passagecommunicating with both the inner compartments, valve seats located atthe entrance ends of the said passage and in a location directlyopposite the diaphragm, distinct gas outlet passages leading from theinner compartments, distinct mercury inlet passages communicating withthe outer compartments and a valve normally opposing each valve seat andengaging the diaphragm.

5. A gas controlling device for type setting machines comprising a valvecasing presenting two inner valve chambers, flexible diaphragms crossingthe chambers and dividing them each into two distinct inner and outercompartments, a gas supply passage communicating vvith both the innercompartments, valve seats located at the entrance ends of the saidpassage and in a location directly opposite the diaphragm, a valveopposing each valve seat, a compression spring operating on each valveand holding it normally unseated and against the diaphragm, distinct gasoutlet passages` leading from the inner compartments and distinctmercury inlet passages communicating with the outer compartments.

6. A gas controlling device for type setting machines comprising a valvecasing presenting two inner valve chambers, ilexible diaphragme crossingthe chambers and dividing them each into two distinct inner and outercompartments, a gas supply .pas

sage communicating with both theinner compartments, valve seats locatedat the entrance ends of the said passage and in a location directlyopposite the diaphragm, a valve opposing each valve seat, a compressionspring operating on each valve and holding it normally unseated andagainst the diaphragm, distinct gas outlet passages leading from theinner compartments, distinct mercury inlet passages communicating withthe outer compartments and adjustable means for varying the capacity ofthe mercury passages.

leading from the inner compartments, distinct mercury inlet passagescommunicating With the outer compartments and an adjusting screwoperating in each mercury passage and permitting of the varying of thequantity of mercury admitted to the i11 terior of the gas controllingdevice.

Signed at Winnipeg, this 26th day of September, 1917.

CHARLES SYLVESTRE.

In the presence of- GERALD S. ROXBURGH, K. B. VAKEFIELD.

